Body fat percentage formula

Robertlawnicki

My wife checked her body fat % using the zone calculator, it came up with 18% body fat.

When we used 4 other type formulas we came up with 33%, 30.4%, 28.3% and 26.9%.

we used the Deurenberg 1&2 formula, the Gallagher formula, and the Jackson Pollock formula.

Deurenberg formula 1 (1.20 x BMI) + (0.23 x Age) - (10.8 x Gender) - 5.4 her results 33.0%

Deurenberg formula 2 (1.29 x BMI) + (0.2 x Age) - (11.3 x Gender) - 8 her results 30.4%

Gallagher formula (1.46 x BMI) + (0.14 x Age) - (11.6 x Gender) - 10 her results 28.3%

Jackson Pollock formula (1.61 x BMI) + (0.13 x Age) - (12.2 x Gender) - 13.9 her results 26.9%

Gender 1 for male 0 for female



Which is the correct formula or is there another method we should use



Bob

dawnemjh

Great question!!

Does she have calipers to check BF%????

LorinaLynn

I imagine for starters, you can toss out any that go by her BMI. BMI has nothing at all to do with body fat. It's just based on your height to weight ratio. So those formulas would go by an average percentage based on her age. And if she's very fit and has lower body fat, it wouldn't be accurate at all.

http://www.leighpeele.com/body-fat-pictures-and-percentages - scroll down for female images and see where she compares.

Robertlawnicki

We do not have calipers.

BobbyClerici

All of that is just a bunch of poppycock.
Just pick one definitive measurement and stick with it.

I use this:
http://www.scientificpsychic.com/fitness/diet.html

It's free and spot on.
My scale also had a bodyfat tool, but it fluctuates 10 points. Measurements don't lie.

Robertlawnicki

My wife is in great condition she compares to the 15% image vs the formula showing 25%. How did they calculate the 15%

Robertlawnicki

I went to the location you use and I cannot find the formula. I am sure that I am not looking in the correct spot.

Bob

RonSwanson66

I use this:
http://www.scientificpsychic.com/fitness/diet.html

It's free and spot on.

What objective measurement leads you to believe it's "spot on"?

http://www.leighpeele.com/body-fat-pictures-and-percentages - scroll down for female images and see where she compares.

This would be your best bet.

wellbert

There are accurate tests, but they involve getting dunked. Pick one that's easy to do and just use it to compare against the same test for future results.

kyle4jem

All of that is just a bunch of poppycock.
Just pick one definitive measurement and stick with it.

I use this:
http://www.scientificpsychic.com/fitness/diet.html

It's free and spot on.
My scale also had a bodyfat tool, but it fluctuates 10 points. Measurements don't lie.

I just tried this and it gave me a BF% value of 31.7%. I have a set of WW body analyser scales that I use for my weigh-in and they have me at 34.2% as per last weigh-in.

I also have a spreadsheet with my TDEE plotted for my various weights in 5kg increments and I now have my MFP goals setup to maintenance calories for my goal weight of 65kg (143lbs)

MJ7910

best bet is a dexa or bod pod measurement. some people are really skilled at measuring with calipers. i'd try to find a professional who can tell you, to be completely honest. those online calculators can be way off. scales too.